Anomalous Line Shape Of The Cross Section For E(+)E(-)-> Hadrons In The Center-Of-Mass Energy Region Between 3.650 And 3.872 Gev

Medina Ablikim,JingZhi Bai,Yong Ban,Xiao Cai,Hongfang Chen,Hesheng Chen,Haixuan Chen,J. C. Chen,Jin Chen,Y. B. Chen,Yuanping Chu,YouShan Dai,LiYing Diao,Ziyan Deng,Q. F. Dong,ShuXian Du,S. S. Fang,Shuangshi Fang,ChengDong Fu,Cuishan Gao,S. D. Gu,Shudi Gu,YunTing Gu,Yanan Guo,KangLin He,Y. K. Heng,Yuekun Heng,Jingmin Hou,Haiming Hu,Junhui Hu,G. S. Huang,GuangShun Huang,Xmgtao Huang,X. S. Jiang,XiaoShan Jiang, XingYu Jiang,D. P. Jin,Dapeng Jin,Y. F. Lai,Yuanfen Lai,H. B. Li,Haibo Li,R. Y. Li,RenYing Li,Shunming Li,W. D. Li,W. G. Li,X. N. Li,Xiaonan Li, Y. F. Liang,Hongbo Liao,C. X. Liu,Fuming Liu,H. H. Liu, Huihui Liu,Huaimin Liu,J. B. Liu,J. P. Liu,Jueping Liu,Jian Liu,QiuGuang Liu,Rongguang Liu,Zhen'An Liu,Y. C. Lou,Feng Lü,GongRu Lu,JunGuang Lü,Chenglin Luo,Fengcai Ma,HaiLong Ma,Lingling Ma,QiuMei Ma,Zepu Mao,XiaoHu Mo,R. G. Ping,Ronggang Ping,NaDing Qi,J. F. Qiu,Z. Y. Ren,ZhenYu Ren,X. D. Ruan,XiangDong Ruan,Lei Shan,D. L. Shen,DingLi Shen,Xiaoyan Shen,Huayi Sheng,S. S. Sun,Shengsen Sun,YongZhao Sun,ZhiJia Sun,Xiaowei Tang,Guoliang Tong,Dayong Wang,Lingyu Wang,Liang Wang,Lin Wang,Meng Wang,P. L. Wang,Peilin Wang,W. F. Wang,Yifang Wang,Zhimin Wang, Zheng Wang,D. H. Wei,DaiHui Wei,Yao Weng,X. M. Xia,Xiaomi Xia,XiaoXi Xie,Guang Xu,X. P. Xu,M. L. Yan,H. X. Yang,Y. X. Yang,Yongxu Yang,Minghan Ye,Yunxiu X. Ye,C. Z. Yuan,Chao Yuan,S. L. Zang,Shu Zang,B. X. Zhang,BingXin Zhang,BingYun Zhang,Changchun Zhang,D. H. Zhang,H. Y. Zhang,Hongyu Zhang,Jiawen Zhang,Jianyong Zhang,S. H. Zhang,Xueyao Zhang,Yiyun Zhang,Zhaoxiang Zhang,Ziping Zhang,Dixin Zhao,Jingwei Zhao,Minggang Zhao,Pingping Zhao,Z. G. Zhao,Zheng Guo Zhao,Hanqing Zheng,Z. P. Zheng,Zhi Zheng,Liang Zhou,KeJun Zhu,Qiming Zhu,Yingchun Zhu,YongSheng Zhu,B. A. Zhuang,Baoan Zhuang,XuAi Zhuang,Bingsong Zou

PHYSICAL REVIEW LETTERS（2008）

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摘要

We observe an obvious anomalous line shape of the e(+)e(-)-> hadrons total cross sections in the energy region between 3.700 and 3.872 GeV. It is inconsistent with the explanation for only one simple psi(3770) resonance with a statistical significance of 7 sigma. The anomalous line shape may be explained by two possible enhancements of the inclusive hadron production near the center-of-mass energies of 3.764 and 3.779 GeV, indicating that either there is likely a new structure in addition to the psi(3770) resonance around 3.773 GeV, or there are some physics effects reflecting the D (D) over bar production dynamics.

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